[NTG-context] \combinepages[]: Change order

[Tobias Burnus]

Hello,

Using \combinepages[some-pdf][nx=3,ny=5], I get:

 1  2  3
 4  5  6
 7  8  9
10 11 12

However, I'd like to get:
 1  5  9
 2  6 10
 3  7 11
 4  8 12

How can one achieve this? (I want to create again a poster out of talk.pdf.)

Tobias